1.You can use the app to control the pattern on the LED backpack, add custom text pixel creative graffiti, or upload other artwork/animation to show your cool style theme. The app has multiple display functions such as games, creative clocks, video playback, cycling mode, etc.
2. Plug the backpack USB port into a mobile power bank.
Download the APP for your phone.
Connect the backpack via Bluetooth to pair with your smartphone device and use the APP to control the image, animation or text displayed on the backpack. It's very simple. There is a product manual in each package.
Audited Supplier 
){kind=link}